arch/cris/kernel/sys_cris.c

   1 /* $Id: sys_cris.c,v 1.6 2004/03/11 11:38:40 starvik Exp $
   2  *
   3  * linux/arch/cris/kernel/sys_cris.c
   4  *
   5  * This file contains various random system calls that
   6  * have a non-standard calling sequence on some platforms.
   7  * Since we don't have to do any backwards compatibility, our
   8  * versions are done in the most "normal" way possible.
   9  *
  10  */
  11
  12 #include <linux/errno.h>
  13 #include <linux/sched.h>
  14 #include <linux/syscalls.h>
  15 #include <linux/mm.h>
  16 #include <linux/fs.h>
  17 #include <linux/smp.h>
  18 #include <linux/sem.h>
  19 #include <linux/msg.h>
  20 #include <linux/shm.h>
  21 #include <linux/stat.h>
  22 #include <linux/mman.h>
  23 #include <linux/file.h>
  24 #include <linux/ipc.h>
  25
  26 #include <asm/uaccess.h>
  27 #include <asm/segment.h>
  28
  29 asmlinkage unsigned long old_mmap(unsigned long __user *args)
  30 {
  31         unsigned long buffer[6];
  32         int err = -EFAULT;
  33
  34         if (copy_from_user(&buffer, args, sizeof(buffer)))
  35                 goto out;
  36
  37         err = -EINVAL;
  38         if (buffer[5] & ~PAGE_MASK) /* verify that offset is on page boundary */
  39                 goto out;
  40
  41         err = sys_mmap_pgoff(buffer[0], buffer[1], buffer[2], buffer[3],
  42                        buffer[4], buffer[5] >> PAGE_SHIFT);
  43 out:
  44         return err;
  45 }
  46
  47 asmlinkage long
  48 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
  49           unsigned long flags, unsigned long fd, unsigned long pgoff)
  50 {
  51         /* bug(?): 8Kb pages here */
  52         return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
  53 }
  54
  55 /*
  56  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  57  *
  58  * This is really horribly ugly. (same as arch/i386)
  59  */
  60
  61 asmlinkage int sys_ipc (uint call, int first, int second,
  62                         int third, void __user *ptr, long fifth)
  63 {
  64         int version, ret;
  65
  66         version = call >> 16; /* hack for backward compatibility */
  67         call &= 0xffff;
  68
  69         switch (call) {
  70         case SEMOP:
  71                 return sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL);
  72         case SEMTIMEDOP:
  73                 return sys_semtimedop(first, (struct sembuf __user *)ptr, second,
  74                                         (const struct timespec __user *)fifth);
  75
  76         case SEMGET:
  77                 return sys_semget (first, second, third);
  78         case SEMCTL: {
  79                 union semun fourth;
  80                 if (!ptr)
  81                         return -EINVAL;
  82                 if (get_user(fourth.__pad, (void * __user *) ptr))
  83                         return -EFAULT;
  84                 return sys_semctl (first, second, third, fourth);
  85         }
  86
  87         case MSGSND:
  88                 return sys_msgsnd (first, (struct msgbuf __user *) ptr,
  89                                    second, third);
  90         case MSGRCV:
  91                 switch (version) {
  92                 case 0: {
  93                         struct ipc_kludge tmp;
  94                         if (!ptr)
  95                                 return -EINVAL;
  96
  97                         if (copy_from_user(&tmp,
  98                                            (struct ipc_kludge __user *) ptr,
  99                                            sizeof (tmp)))
 100                                 return -EFAULT;
 101                         return sys_msgrcv (first, tmp.msgp, second,
 102                                            tmp.msgtyp, third);
 103                 }
 104                 default:
 105                         return sys_msgrcv (first,
 106                                            (struct msgbuf __user *) ptr,
 107                                            second, fifth, third);
 108                 }
 109         case MSGGET:
 110                 return sys_msgget ((key_t) first, second);
 111         case MSGCTL:
 112                 return sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
 113
 114         case SHMAT: {
 115                 ulong raddr;
 116                 ret = do_shmat (first, (char __user *) ptr, second, &raddr);
 117                 if (ret)
 118                         return ret;
 119                 return put_user (raddr, (ulong __user *) third);
 120         }
 121         case SHMDT:
 122                 return sys_shmdt ((char __user *)ptr);
 123         case SHMGET:
 124                 return sys_shmget (first, second, third);
 125         case SHMCTL:
 126                 return sys_shmctl (first, second,
 127                                    (struct shmid_ds __user *) ptr);
 128         default:
 129                 return -ENOSYS;
 130         }
 131 }